Physemocecis ulmi (Kieffer, 1909)

(Figure 47)

Material: AK, Baerum: Fornebu, Rolfstangen, 59.890374°N 10.633679°E ± 10m, 18 June 2022, 3L, leg. HE & TS, coll. NHMO; Oslo: Gressholmen, 59.884572°N 10.721779°E ± 7m, 1 July 2020, 5L, leg. HE, coll. NHMO; Lillestrøm: Lillestrøm, Åråsen, 59.965767°N 11.064616°E ± 6m, 22 June 2020, 4L, leg. TS, BOLD: NHMO- ENT-548039, coll. NHMO ; 59.966010°N 11.064613°E ± 20m, 29 June 2020, 2L, leg. TS, BOLD: NHMO-ENT-548054, coll. NHMO .

Biology and notes: The white larvae develop in lenticular leaf galls on Ulmus spp. ( Ulmaceae). Our records are all from Ulmus glabra . The gall protrudes slightly on the upper side of the leaf and is surrounded by a yellowish ring, which often develops only after the larva has left the gall. Univoltine; pupation and hibernation in the soil. One of our larvae was barcoded. Surprisingly, it nested among Macrolabis in the barcode tree.

Distribution: Widespread in Europe including Norway, Sweden and Denmark.